论文部分内容阅读
青海省德令哈市拜兴沟地区分布一套中浅变质岩系,前人报告中命名为巴龙贡噶尔组,时代确定为志留纪。本文在浅析该岩片的岩石组合、变形变质特征及沉积环境的基础上,经对侵入于其中的花岗岩同位素测年的年代学等研究,经区域对比,将巴龙贡噶尔组解体,将原志留纪巴龙贡噶尔组厘定为早奥陶世盐池湾组。对其中存在的一套浅中变质的、但变形特征明显的强变形带岩石,命名为哈尔达乌片岩(Pt2-3Hsch),划归为中—新元古代,哈尔达乌片岩的发现与确定,对研究南祁连造山带的形成演化有重要的地质意义。
Qinghai Province, Beling Xing Valley area distributed a set of shallow metamorphic rock series, the predecessor reported named Baronggonggall group, the era identified as Silurian. Based on the analysis of rock assemblage, deformation and metamorphism and sedimentary environment of this rock fragment, the chronological study of granite isotope dating intruded into this area will disintegrate the Bangonggongar Formation, The original Silurian Pakistani Long Konggar group determined as the early Ordovician salt pool Bay group. A series of strong metamorphic rocks, which are characterized by shallow metamorphism but strong deformation features, are named as the Hedda Wu schist (Pt2-3Hsch) and are classified as Meso-Neoproterozoic and Halda Wu schist It is of great geological significance to study the formation and evolution of the southern Qilian orogenic belt.